No vaccination is currently required for entry into Bhutan . However if you are arriving from an area infected with yellow fever, you are required to have a yellow fever vaccination.
If you are arriving from Cholera infected area then officials may ask for evidence of Cholera vaccination. Anti-malarial medication is recommended for all travelers to Bhutan who are visiting rural areas in the districts that border India.
It is suggested that you assemble a traveler’s medical kit appropriate to destination, length of trip and general health. On a tour in Bhutan, there are long drives, and roads are winding so medication for motion sickness is strongly suggested. You should also pack an adequate supply of any prescribed medications you may require while traveling.
Travelers who plan to visit Bhutan should consult a physician about high-altitude travel. After a brief period of acclimatization, most people do not suffer from altitude sickness ; but elderly travelers or those with high blood pressure or heart conditions need to exercise caution at high altitudes.